<template>
    <div>
        <div>
            <el-input style="width: 200px" placeholder="查询标题" v-model="title"></el-input>
            <el-button type="primary" style="margin-left: 10px" @click="load(1)">查询</el-button>
            <el-button type="info" @click="reset">重置</el-button>
        </div>
        <div style="margin: 10px 0">
            <el-button type="primary" plain @click="handleAdd">新增</el-button>
            <el-button type="danger" plain @click="delBatch">批量删除</el-button>
        </div>
        <el-table :data="tableData" stripe :header-cell-style="{ backgroundColor: 'aliceblue', color: '#666' }" @selection-change="handleSelectionChange">
            <el-table-column type="selection" width="55" align="center"></el-table-column>
            <el-table-column prop="id" label="序号" width="70" align="center"></el-table-column>
            <el-table-column prop="title" label="标题"></el-table-column>
            <el-table-column prop="content" label="内容" show-overflow-tooltip></el-table-column>
            <el-table-column prop="user" label="发布人"></el-table-column>
            <el-table-column prop="time" label="发布时间"></el-table-column>
            <el-table-column label="是否公开">
                <template v-slot="scope">
                    <el-switch v-model="scope.row.open" @change="changeOpen(scope.row)"></el-switch>
                </template>
            </el-table-column>
            <el-table-column label="操作" align="center" width="180">
                <template v-slot="scope">
                    <el-button size="mini" type="primary" plain @click="handleEdit(scope.row)">编辑</el-button>
                    <el-button size="mini" type="danger" plain @click="del(scope.row.id)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>

        <div style="margin: 10px 0">
            <el-pagination
                    @current-change="handleCurrentChange"
                    :current-page="pageNum"
                    :page-size="pageSize"
                    layout="total, prev, pager, next"
                    :total="total">
            </el-pagination>
        </div>

        <el-dialog title="公告信息" :visible.sync="fromVisible" width="40%" :close-on-click-modal="false">
            <el-form :model="form" label-width="80px" style="padding-right: 20px" :rules="rules" ref="formRef">
                <el-form-item label="标题" prop="title">
                    <el-input v-model="form.title" placeholder="标题"></el-input>
                </el-form-item>
                <el-form-item label="内容" prop="content">
                    <el-input type="textarea" v-model="form.content" placeholder="内容"></el-input>
                </el-form-item>
            </el-form>

            <div slot="footer" class="dialog-footer">
                <el-button @click="fromVisible = false">取 消</el-button>
                <el-button type="primary" @click="save">确 定</el-button>
            </div>
        </el-dialog>

    </div>
</template>

<script>

    export default {
        name: "Notice",
        data() {
            return {
                tableData: [],  // 所有的数据
                pageNum: 1,   // 当前的页码
                pageSize: 5,  // 每页显示的个数
                username: '',
                title: '',
                total: 0,
                fromVisible: false,
                form: {},
                user: JSON.parse(localStorage.getItem('honey-user') || '{}'),
                rules: {
                    title: [
                        { required: true, message: '请输入标题', trigger: 'blur' },
                    ],
                    content: [
                        { required: true, message: '请输入内容', trigger: 'blur' },
                    ]
                },
                ids: [],
                content: '',
            }
        },
        created() {
            this.load()
        },
        methods: {
            changeOpen(form) {
                // 调用更新的接口  更新数据到数据库
                this.form = JSON.parse(JSON.stringify(form))
                this.sendSaveRequest()   // 直接发请求就可以了
            },
            delBatch() {
                if (!this.ids.length) {
                    this.$message.warning('请选择数据')
                    return
                }
                this.$confirm('您确认批量删除这些数据吗？', '确认删除', {type: "warning"}).then(response => {
                    this.$request.delete('/notice/delete/batch', { data: this.ids }).then(res => {
                        if (res.code === '200') {   // 表示操作成功
                            this.$message.success('操作成功')
                            this.load(1)
                        } else {
                            this.$message.error(res.msg)  // 弹出错误的信息
                        }
                    })
                }).catch(() => {})
            },
            handleSelectionChange(rows) {   // 当前选中的所有的行数据
                this.ids = rows.map(v => v.id)
            },
            del(id) {
                this.$confirm('您确认删除吗？', '确认删除', {type: "warning"}).then(response => {
                    this.$request.delete('/notice/delete/' + id).then(res => {
                        if (res.code === '200') {   // 表示操作成功
                            this.$message.success('操作成功')
                            this.load(1)
                        } else {
                            this.$message.error(res.msg)  // 弹出错误的信息
                        }
                    })
                }).catch(() => {})
            },
            handleEdit(row) {   // 编辑数据
                this.form = JSON.parse(JSON.stringify(row))  // 给form对象赋值  注意要深拷贝数据
                this.fromVisible = true   // 打开弹窗
            },
            handleAdd() {   // 新增数据
                this.form = {}  // 新增数据的时候清空数据
                this.fromVisible = true   // 打开弹窗
            },
            save() {   // 保存按钮触发的逻辑  它会触发新增或者更新
                this.$refs.formRef.validate((valid) => {
                    if (valid) {
                        this.sendSaveRequest()
                    }
                })
            },
            sendSaveRequest() {
                this.$request({
                    url: this.form.id ? '/notice/update': '/notice/add',
                    method: this.form.id ? 'PUT' : 'POST',
                    data: this.form
                }).then(res => {
                    if (res.code === '200') {  // 表示成功保存
                        this.$message.success('保存成功')
                        this.load(1)
                        this.fromVisible = false
                    } else {
                        this.$message.error(res.msg)  // 弹出错误的信息
                    }
                })
            },
            reset() {
                this.title = ''
                this.load()
            },
            load(pageNum) {  // 分页查询
                if (pageNum)  this.pageNum = pageNum
                this.$request.get('/notice/selectByPage', {
                    params: {
                        pageNum: this.pageNum,
                        pageSize: this.pageSize,
                        title: this.title
                    }
                }).then(res => {
                    this.tableData = res.data.records
                    this.total = res.data.total
                })
            },
            handleCurrentChange(pageNum) {
                this.load(pageNum)
            },
        }
    }
</script>

<style>
    .el-tooltip__popper{ max-width:300px !important; }
</style>
